Patent US3439706A successfully refreshed from Google Patents.
US3439706A
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Remote valve actuation and indication system
Assignee: EDWIN R BARRETT
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Filing: 1966-03-02
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Granted: 1969-04-22
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Expires: 1986-03-02
Abstract
No abstract record available.
Inventors
- 👤 Edwin R Barrett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:05
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/20; F15B15/28; F15B15/2807; F15B15/2892; F16; F16K; F16K37/00; F16K37/0025; F16K37/0033; F16K37/0041; F15B11/00; F15B11/16; F15B11/17; F15B2211/00; F15B2211/20; F15B2211/205; F15B2211/20576; F15B2211/30; F15B2211/305; F15B2211/3056; F15B2211/3059; F15B2211/30595; F15B2211/40; F15B2211/41; F15B2211/411; F15B2211/415; F15B2211/41509; F15B2211/41518; F15B2211/41554; F15B2211/42; F15B2211/421; F15B2211/423; Y; Y10; Y10T; Y10T137/00; Y10T137/6851; Y10T137/6855; Y10T137/6906; Y10T137/8158; Y10T137/8225; Y10T137/8242
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |